Gravity Introduction

All Textbook Topics - Forces and Motion - Gravity Introduction

Weight? Gravity? Do you know the difference? Gravity causes objects to fall to Earth but there are many misconceptions held about it. Complete the gravity introduction quiz to become a master of the Physics of Gravity.

Textbook Learning Objectives
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1	All masses have a gravitational field around them, but any effect is weak unless the mass is very large
2	A gravitational field is a region where a mass will experience a force
3	The range of a gravitational field is infinite so all masses exert a force on all other masses through gravity, at great distance, the force is very, very small
4	Forces due to gravity are always attractive
5	The force due to gravity is called Weight
6	The value of gravitational field strength on the Earth's surface is approximately 10N/kg
7	The value of gravitational field strength (g) on other planets and moons is different because the mass of other planets and moons is different to the mass of the Earth
8	The equation to calculate weight from mass is: Weight = mass x gravitational field strength (symbol equation: W=mg)
9	If there was no air, all objects would fall to Earth with the same acceleration, no matter the weight
10	Air resistance causes objects which are either heavier or more aerodynamic to fall faster than objects which are lighter and less aerodynamic